Hi Prasanna, The feature page has some details about this http://www.gluster.org/community/documentation/index.php/Features/File_Snapshot https://github.com/gluster/glusterfs-specs/blob/master/done/Features/file-snapshot.md
--Humble On Wed, Dec 23, 2015 at 5:20 AM, Vijay Bellur <[email protected]> wrote: > On 12/21/2015 06:47 AM, Prasanna Kumar Kalever wrote: > >> Hi Team, >> >> I have few queries regarding file snapshot feature in gluster >> >> what are the limitations of Block device translator and qemu-block >> translator ? >> Are we using them some where ? >> Do we have plans to improve them ? >> Or someone have a design to implement file snapshot feature ? >> >> > I have not heard much feedback about these two translators. The qemu-block > functionality can be handy for exposing virtual block devices and due to > features like native snapshotting, it could be quite interesting in use > cases that require virtual block devices. > > The qemu-block translator has not been tested of late. A few months back I > tried mkfs.xfs after attaching the block device and it failed. I did not > find more time to look into that further. > > file snapshotting could be a possibility with dht2 but I don't think much > work has happened in that direction. > > The other possibilities for file snapshotting include reflinks and > overlay. Given that reflinks support is most probably going to land > sometime in xfs, we might be able to leverage this feature and explore the > possibility of providing snapshots with backend filesystems that are > reflink capable (btrfs, xfs etc.). > > >> I am really thankful if some one gives more details about qemu-block >> xlator, >> I don't see enough documentation regarding this :( >> >> > qemu-block xlator provides the ability to snapshot files by relying on > qcow2/qed image formats. what specific details are you looking for? > > Avati & Brian probably have the maximum context about this translator. > > Regards, > Vijay > > > > _______________________________________________ > Gluster-devel mailing list > [email protected] > http://www.gluster.org/mailman/listinfo/gluster-devel >
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